chore(format): run prettier over src/ and scripts/

Formatting was configured but never enforced: `bun run format:check`
reported 199 unformatted files and ran in no workflow and in no git hook,
so .prettierrc (printWidth 100, trailing commas) described an intention
rather than the tree.

This is the one-time sweep that makes the check gateable. Whitespace and
token-reflow only -- no behavioural change: `bun run check` reports 0
errors and all 1053 frontend tests pass before and after.

Kept out of every other commit on purpose. A 199-file diff mixed with
real changes is unreviewable, and the next commit turns format:check
into a hard CI gate so this cannot silently accumulate again.

src/lib/components/library/SeasonSection.svelte

@@ -37,14 +37,14 @@
   }: Props = $props();
 
   const holdsCurrentEpisode = $derived(
-    currentEpisodeId != null && episodes.some((e) => e.id === currentEpisodeId)
+    currentEpisodeId != null && episodes.some((e) => e.id === currentEpisodeId),
   );
   const watchedCount = $derived(episodes.filter((e) => e.userData?.isPlayed).length);
 
   const episodeCount = $derived(episodes.length);
   const seasonNumber = $derived(season.indexNumber ?? season.parentIndexNumber);
   const seasonName = $derived(
-    season.name || (seasonNumber != null ? `Season ${seasonNumber}` : "Unknown Season")
+    season.name || (seasonNumber != null ? `Season ${seasonNumber}` : "Unknown Season"),
   );
   // Seasons have no page of their own; a season link scrolls to this anchor
   // inside the series' single continuous episode list.
@@ -55,7 +55,9 @@
   <!-- Season header -->
   <div class="flex gap-4 p-4 bg-[var(--color-surface)] rounded-xl">
     <!-- Season poster -->
-    <div class="flex-shrink-0 w-20 aspect-[2/3] rounded-lg overflow-hidden bg-[var(--color-background)]">
+    <div
+      class="flex-shrink-0 w-20 aspect-[2/3] rounded-lg overflow-hidden bg-[var(--color-background)]"
+    >
       <CachedImage
         itemId={season.id}
         imageType="Primary"
@@ -135,7 +137,7 @@
           <SeasonDownloadButton
             seasonId={season.id}
             seriesName={season.seriesName || ""}
-            seasonName={seasonName}
+            {seasonName}
             seasonNumber={season.indexNumber || season.parentIndexNumber || 0}
             {episodeCount}
             size="sm"